Plow.



F'. E. DAVIS.

PLOW.

LPPLIOATIOI mum mu m, 1907.

Ptented July 19, 1910.

8 SHEETS-SHEET 1.

F. E. DAVIS.

PLOW.

APPLICATION FILED JUFE 10, 1907.

Patented July 19, 1910.

5 BHDETS-SHEET 2.

llu/lijo oooooooccooooooooo 2 y- Zllac CL away F. E. DAVIS.

PLOW.

nPLIuA-rmx FILED JUHE 10, 1901.

Patented July 19,1910.

3 SEEBTS-SEEET 3.

: l enfor. M a. 2

wheels, a. supportingfvenient and slow.

FRANK E. DAVIS. OF LA CROSSE, XVISCONSI PLOW.

Specification of Letters Patent.

Patented July 19, 1910.

Application filed June 10. 1907. Scr 'aFNo. 378,129.

To all whom it may concern: 1

Be it known that I, FRANK DAVIS, a resident of La Crosse, in the county of La Crosse and State of Vvisconsin, have invented certain new and. useful Improvements in Plows, of which the following is a full, clear, and exact description.

The invention relates to plows, and more particularly to that ty as in which carryingt rame and mechanism for raising and lowering the plow or plows are employed, such type being generally known as riding plows.

In plow-operating mechanisms as heretofore constructed. itis customary in many instances, to employ a direct connection between the 0 crating-lever and the plow-operating cran or bail and in other instances a link is included in the connection between the operating-lever and the plow. \Vheu a lever mounted to swing eccentrically with respect to the plow-opcratin crank or arm is employed in a foot-operab e shifting mechanism, the lever must be of considerable length and given an extended swee) so a short operating crank or bail can he employcd in order to render the mechanism conveniently operable by foot- Anextended sweep of such a long foot-lever is objection able because the operation is rendered inconlVhen a link-connection is'associated with an operatingmrm of the lever and the plow-operating bail or crank and said lever are of differential length and they are brought into dead-center relation or substantially so, to lock the plow in one of its alternative positions, the sweep of the foot-lever cannot alwavs be disposed so that it; is conveniently operable by one foot of the operator. As a result of the same construction when an extended sweep of the f otlever is employed to cause the operatingarm of the link-connection to travel over a aufiicientarcto operate the plow from one of its positions to the other, the operation of the foot-lever during a portion of its sweep is effected with difficulty.

The present invention designs to provide a construction of plow-shittin; mechanism in which the sweep of the operating lever is disposed for convenient operation by the foot of the operator and in which a differential or compound leverage is attained by which the greatest power is applied during that portion of the lifting or lowering movement of the plow in which it inecessary, 1'. 0., when the soil resists its movement.

The. invention fnrthcrdesigns toprovide an improved foot-operable liftirig-mechanism for the plow and also an improved foot-opcrated or controlled lowering mechanism.

The invention cons sts in the several novel features hereinafter set forth and more particularly defined by claim at the conclusion hereof.

In the drawings: Figure 1 is an elevation from the land-side. the land-wheel being shown in dotted lines, and the plow in raised osition. Fig. is a detail of the plow ifting-mechanism in position assumed when the plow is in lowered or working position. Fig. 1 is a detail end view of the latch for holding the plow in raised position and its associated parts. Fig. 2 is a plan. Fig. 3 is a longitudinal section showing the improved plow-lowering mechanism. Fig. 3 is a detail view showing the lowering mechanism in position assumed when the plow is in lowered position.

The invention is illustrated-as applied to a gang plow, although it w'll be understood that it may be applied to other types of plows.

l0 denotes a plow-sopporting-framc sustained by the usual front furrow-wheel, 11 and the. rear furrow or easier wheel 12 in any suitable or usual manner and a landwhcel 13. These wheels are usually adjustably connected to the frame so the frame may be adjusted with respect to the ground as well understood in the art. At. the front of the frame an arch l4 transversely connects the sides of the supporting-frame 10. Furrow-wheels 11 and 12 have, as usual, :1. swiveled connection to the main frame. being respectively mounted on standards 15 and 16 whi h are swiveled in suitable. bra kets secured to the supportlug-Frame. One or more plows 13 are each secured to a beam 19 and supported by and connected to the. main-frame at the trou lrv a bail 20 which serves as a crank and is pivotally mounted in a bracket 31 at each side of the frame. The eccentric portion oi the ball is pivotcdto each plmv-beann being held in suitable bra kets 30" and serves to operatively connect the frame and the plow for raising or lowering: movement. The rear of the plow is controlled by a guide-bracket .21 having a cam slot 22 therein which causes the rear end of theplow to rise and fall in response to the operation of bail 2 and to control the horiz ntal positi n of the plow as bail it) is moved forwardly am dowir wardlv r upwardlv and havlcuardly. stud in roller-abntua-nt .23 suitably connected to the main frame extends inter or through slot 21:. the latter being provided with an otl'set or seat 2'3 at its front and lower end and an otl'set or seat 22* at its upper end. the guide in its entirety being formed so that as a result of movement of bail .30 the plow or plows will enter the ground point til-st and then assume a correct and true position for plowing and so the plow-point will rise point first to facilitate the witlnlrawal ot' the plow from the ground bv the draft of the team. Guide ll is soriired to bats :24 which are rigidly secured to one of the blow beams li The fronts of tle plnw-beams are connected by a elevisbar 2.- to which the tenor is connected. A

lifting; or conntenbalaneing spring 26 is.

'tpplied to assist in the lit:lug-operation and to re ist descent of the plow; being eonnerted at on! nd to a ln; or bra ket 21' secured to frame and at its other end to a bug s cured to one of the })lH\\'-l&t:lltl$. foam-est ill for one of the feet of the operator is sei-nred to one of the beams 15 and a rest. 30 is ecured to the frame 10 for the other foot of the operator. The land-wheel is adjustablv connected to the main frame, being journaled on a stud or stub-axle 31 which is secured to the distal end of a bracket. 32 which is pivotally mounted on the projecting end 20" of the bail 20. A lever 33 is secured to bracket 32 and is provided with the usual lever-lock 34. which is adapted to engage a rack which is nonrotatably and rigidl" secured to the main frame by a laterally extending lug or bracket. 36. A seat 37 for the operator is suitably sustained by the frame.

The improved lowering-inechanism comprises a foot-leve 38 which is pivotally mounted on the eccentric. portion of bail 20, being secured against lateral displacement: thereon by a hook-h1g3!) which is adapted to travel in a grooved collar 40 which is clamped to the bail. Foot-lever 38 has a treadle or foot-piece 41 at its rear end and extends forwardly of its pivot to form an arm 42 in which an' angular slot 43 is formed. A bracket 44 is secured to frameareh 14 bv a bolt 45 and is extended to provide a hi vot 4l3'at the front end of a strut or link 47 which is connected at its rear end by a bolt 18 to the fixit-lever 38, the bolt exteudin; through angular slot 43 and having a friction roller thereon which is adapted to travel in the slot. Arm 42 of foot-lever 38 is provided with a stud or abutment 49, which is adapted -to rest in a seat or notch in link 47 to interlock the foot-lever and wvithdraw stud 49 fret the link by resisting any forward and downward movement of the plow-operating bail :20 when foot-lever 38 is in normal position, (Fig. 3). In the position illustrated ll Fig. 3, the plow being then raised, stud 49 and the seat 50 form a druid-center lrx-king-device between the lever arm 42 which is pivoted on the bail and link 47 which is pivoted as at 46 to the main frame. A notch 49 is also provided for similarl locking the plow in a somewhat lower position, this being for the convenience of a rider with short legs who tiuds it inconvenient to lift the plow to the extreme upper position shown in Fig. 3. A spring 51 is applied to a rod 52 which is pivotally connected as atto arm 42 of the foot-lever to yieldingly hold the foot-lever so that the fmt-lever will be yieldinglv held in position to prevent witln'lrawal of the stud 49 from its seat. 50 when the lowering-connection is locked to hold the plow in raised position.

Rod 52 is uided in a slot 54 formed n, v

bracket- 44 and, being yieldingly held, permits the. foot-lever to be swung by the operator to release the lowering-connection. For convenience in construction, plural links 7 are provided which are cross eonneeted b bolt 48 and lever-arm 42 is disposed between said links.

The operation of the plow lowering-mechanism will be as follows: Assuming the plow to brain raised position (Fi 3) the operator will depness lever 38 and during the initial movement thereof said lever will swing about crank 20 as a fulcrum and notch 50 oflinkstrut 47. Rod 52, which is yieldingly held by spring 51, extends loosely through slot, 54 in bracket 44, yielding sufiieiently to permit the lever 38 to be swung into position to disengage the stud 49 from notch 50. The lowering-connection will then be unlocked so that lever 38 will be free to be. further depressed. During further de res- SlO'l of the treadle 41 on lever 38 the ront end of said lever will be pressed against upward movement by rod 52 and the crank 20 and plow will be lowered until the reach the position shown in Fig. 3. During the initial lowering movement of'erank 20 stud 48 on lever-arm 42 will remain in the horizontal portion of the angular slot; 43 and resist backward movement of leverarm 42 so that: the foot-lever 38 will be operated about said stud as a movable fulcrum and then as the lowering movement of the crank 20 continues the stud wilt slide backwardly in the slot 43 and pass into the end 43 of said slot. The angular slot thus guides the strut-link not pass into either of the notches 49 or 50 during the lowering operation of the plow. During this lowering movement the stud and slot connection between the link 47 and so that. stud 49 will l t t lever arm 42, resultin a gradual increase of the leverage applied by the footdevcr to the crank so that. during the latter portion of the lowering-movement, when the plow is entering the soil, greater leverage is attained than during the initial lowering movement when there is little resistance to the lowering of the plow. Furthermore, as a result of this construction, the sweep of lever 38 is arranged for substantially vertical movement and convenient operation by the operator and the power is differentially applied. The disposition of the link-strut.

and th-i lever-arm is such that they automatically pass into locking-position when crank 20 is shifted to raise the plow by mechanism hereinafter set forth. Mann fmtly the sliding connection between the lever and link provided by angular slot 4 causes the force of the lever to be con;-

poundly or differentially applied and the,

arrangement of the parts tor selflocking' and release thereof by the foot-lever facilitates the lowering thereof so that the plow can be controlled by the operator with ease.

Foot-operable plow lifting-mechanism provided and comprises an arm (30 keyed o rigidly secured to the ball fulcrum or shaft 20. A foot-lever 62 is pivoted as at 63 to the frame and said pivot is eccentrically disposed with respect to the bail fulcrum so that during shift of said lever it will swin eccentrically with respect to arm 60 an cause the lever to be ditferentially a plied to the arm to apply greatest leverage diiring the initial upward shiftof the plow, 2'. (2., when the plow is being lifted out. of the soil. To effect this ditferential application of power a sliding-connection is provided in .the connection which causes the force of the lever to be differentially applied during a a spring 68 applied to said rod.

lifting operation. In the embodiment of the invention shown, lever 62 has a sliding connection with the outer end of arm 60 which is bifurcated and provided with a friction roller 63' which is engaged by the lever. This sliding connection causes variation of the point of a plication of power between the lever and tie arm to effect the differential operation aforesaid. An automatic locking device is provided for securing the plow in lowered position, this being operable by the foot-lever so that when the operator depresses the foot-lever 62 the initial movement thereof will release the lockin -device. This locking device comprises a 0gor latch 64 which is pivotally connected to bolt 65 at the outer end of arm 60, is yieldingly pressed into operative position by a. rod 66 pivoted to a log 67 on the latch and Dog (3-1 is bifurcated and the lover 62 passes therethrough and is provided with :1 lug (3!) adapted to engage arm 60 to limit its movument in one direction by spring 68. The

dog is provided with an offset book To adapted to engage with :1 lug Tl iulcgrallv formed with -bracket 61. when the lifting niechanism is in position. to hold the plow in lowered position. A stud or llllll llltlll 72 on foot'lever 92 is adapted to engage the edge of dog (A to initially iclcasc dog-hook 70 fr m lug Tl and release the lifting mm banism.

When the plor: is in lowered po ition the foot-operable lifting-me hani m in the position illustrated in Fig. l. The lifting operation will be as follows: When the opt-rzitor depresses lever U1! allo -t it ful -m it}, stud 72 on said ltV l will engage inclined in; it and swing the latch oi rrarvrardly about its pivot 33 :lfLllHsl the force of spring 65 and free the latch from lug- Tl. to release the plow. Further movement of foot-lever G: will cause it to engage roller 33 at the cod of arm 60 and initially at a point, close to lever-fulcrum 613. As a result of the swinging movement of said arm and lever aboiit their relative eccentri pivots res x-ctivcly and the sliding coni| -..-tioi1 for the footlevcr, the initial movement of the lever will be applied at the mint of greatest leverage, and the distance )ctwcen the lever-fulcrum and the point of applied power of the lever is gradually increased so the leverage will become less. llesultantly greater leverage is attained during the initial upward movementwhen the plow must overcome the resistance of tluc soil than during the latter part of the upward movement. when the )low is out of the soil and is easily operable y the foot lever, when the least leverage is employed. In the lifting mechanism the several parts thereof are sustained so that all )arts are freely shiftahle in response to the lever and the mechanism in its entirety is operable with case. The lifting-mechanism is restored to operative position by the lowering mechanism and vice versa.

T he invention is not to he understood as restricted to the precise details shown and described, since these can be varied without departing from the spirit and scope of the invention.

Having thus described the inventiomwhat I claim as new and desire to secure by Lettcrs latcnt, is:

l. in a riding-plow, the combination of carrying-wheels, a frame, a plow, plowshifting mechanism comprising a pivoted arm, a lever mounted to swing eccentricall with respect to said arm, and a sliding connection for varying the operative length of one of said elements so that the force of the lever will be diti'ercntially applied to shift the plow, and an automatically operated lm-lting-dcvice for holding the plow in one of its positions.

2. In a riding-plow, the combination of carrying-wheels, a frame, a plow, plow lift.

ing'meclnmism compri ing a pivoted arm. a swing: eccentrically with respect to said arm,

lever mounted to swingcceentrically with respect: to said arm and a sliding connection for varying the perative lvngth of one of said elements so that the force of the lever will be ditlerentially applied to lift the, plow. an automatically operated locking-det'icP forthe plow.and a plow-lmvering mechanism.

3. lit a riding plowgthe combination of carryingnvheels. a frame, a plow. plow lifting-inw-lianism comprising' a pivoted arm. a foot-lever mounted to swing eccentrically with respect to said arm and a sliding-connection for vanring the operative length of 5 ne of said elements so that the force of the lever will he ditl'ercntially applied in lifting the plow. a toot-operable plow lower|ng-' mechanism, and an automatically operating locking-device for the lifting-mechanism.

4. In a riding-plow, the combination of carrying-wheels. a frame, a plow. plowshifting mechanism comprising an arm operatively connected to the plow, a lever for operating said arm, means for varying the distance between the point of application of the force of the lever and the lever pivot to ditlerentiallv apply the force of said lc'- ver to said arm, amt an automatically operating locking-device for said mechanism. 5. In a riding-plowx the combination of carr 'ing-whm-ls, a frame. a plow, plow-lift ing mechanism comprising an arm operatirely connected to the plow, a lever for opcrating aid arm and m an for varying the distance between the point of application connected to the plow. a leveninonnted to and a sliding connection between said lever and said arm whereby the force of the lever wilt'lie ditterentially applied to the arm, and an automatically operated locking-(levice operable by said lever.

9. In a riding-plow, the combination of carrying-wheels, a frame, a plow, plow-lifting mechanism comprising an arm connected to the plow, a foot-lever mounted to swing eceentrieally with respectto said arm and a .slMing-connection between the arm and lever \t'hcl'tb) the lever will be ditl'erentially applied to the arm. a plow-lowering mechanism. said lifling-mechanism being connected so it will be restored to operative position by the lmrering mechanism and a lt)1'l{ixig-tl \'i(e operable by said foot-lever.

l0. In a riding-plow, the combination of carrying-wht-t l a frame. a plow, plow lifting-mechanism comprising an arm operatirely connectedlto the plow. a lever mounted to swing eccentrieally with respect to the arm, and a liding connection hetween the lever and the arm for differentially apply in; the foree of the lever to said arm, a latch for locking-the arm to seem-o the plow in loweredposition. and means operated by said lever for releasin; said latch.

ll. la a ridingplow, the combination of carrying-whcels. a frame. a plow. front and rear sustaining connections between the frame and the plow. plow shiftinganeclnnb ism comprising a pivoted arm connected to one of said connections. a le er mounted to of the force of the lever and the lever pivot to dillerentially apply the force of said it'- vcr to lift the plow, and an automatically operating lot-hing device for said ll|t'(ll-' anism.

6. In a riding-plow. the combination of carryingwheels. a frame. a plow. plnw- Shiftinganechanism ct'nnprising an arm oprear sustaining-connections eratirely conne ted to the plow. a toot-lever for operating said arm. tin-ans to! varvnig the distance between the point of application of the formof the lever and the leverswing c ccntrically with respect to said arm, and a slidin Lconnct-lion for varying the up el'ative length of ono of said elements so that the force of the lever will he ditferentially applied to shift the plow.

it. in a riding-plow, the combination of carr \'in;;-whcrlr, a frame. a plow, front and between the t'ram-.- and the plow and plow lifting-numbanisni. and comprising an arm connected to one of said connections. a lever mounted 3 to swing eccentrically with respect to said pivot to dill'erentiaily apply the force of! 5 ative length of one of the said elements will said lever to said arm. an automatically operating lm'lting-drriee for said tneclninism, and a t'ont-tnxwahle lowering mechani m.

7. ln a riding'plow. the combination of carryingwheels, a frame. a plow, plowshil'tin, mechanism: comprising a pivoted arm connected to the plow. a lever mounted to swing: e ccntrically with respect to said arm. and a sliding connection between said lever and said arm whereby the force of the lever will be dill'erentially applied to the. arm and an :lltttll:iz.li '2tll operated lockingdevice operable. by said lever.

i-ln a ridingplon; tho combination of ttttl' \ill {\\'lH'clS. a frame, a plow, plmvdlt'ting mechanism comprising a pivoted arm arm, a stMing-connection whereby the operhe varied so that the force of the let-"or will he ditl'erentially applied to liftthe plow, tllltt foot-operable lowering mechanism.

13. In a riding-plow. the combination of carryitag-wheels, a frame, a plow. front and rear snstaining-connections between the frame and tho plow and plow shifting-mechanism comprising an arm pivoted in the frame and o eratively'connected to one of said connections. a lever mounted to swing eceentrieal l y with restwct to said arm, and a sliding connection between the arm and the lever whereby the power of the level will be ditl'erentially applied as the arm is shifted thereby.

was .2.

.ln :1 ridingpinw. the combination of ngnvhccl a frame a plow. a plow supporting crank at the from. a rear snstainin; connection betwccn the frame and the pl w. and plow shiftingmicrhani n: romprisingan arm {l(ll}"5t?ltltl to said crank. a lewr pimp-d to said f 3mccccntritallv with re spit-ct to said sham. and a. lidi-ng connection ia-twc n the arm and tin lcvcr, and a locih ing-ilc'i" reicasal h) by said lever.

. a ridingplcw. it-c combinationof -iitl't' 'lli i-Wltvrix -i lraziw. a plow. a pl w snppoziing crank in the from. a r ar ll7- ta ning conne tion lH'lWttit the l'rzznaand th plow and plow shifting-nici-hanisin com" ;mn rigidly HClil't'tl to said crank, tuotd vcr piv iivil lo nl l frame crcntrivally with reset. to Hllil crank. and :rsliillnffiCOnlicc-iinn between the arm and the levcr, and a ltlt'i[lng-tll\'llfi l'clcnsnblc by said lever. 16. in a ridingpiow, the combination of a frame, carrying-whi-els therefor, a plow and plow 'shit'tirig-mechanism for shifting the plow comprising :1 level and a link. one of which is connected to tlnframe and the other of which is onnected to tin: plow. air-l a sliding connection for one of mill parts which cause the l'orcc of the lcvcr to be ditl'ercntially applii-d 0 that the leverage will be varied during the operation of the lever. I

17. In a riding-plow. the combination of a frame, carrying-wheels therefor, a plow' and plow -sliil'ting mechanism comprising a link and a lever one of which is connected to the frame and the other-of which is connectcd to the plow, and a sliding-connc -tion hctween the link and the lever whereby the power of the lover will be dillerentialh." applied to the plow.

18. In a riding-plow. the combinatioi of a frame, carrying-wheels therefor, a plow, plow-shifting mechanism comprising a. lever and a link, one of which is connected to the frame and the other of which is connected to the plow, and a sliding-connection for one of said parts which can ..cs the force of the lever to be ditt'crcntially applied, and an automatically operating locking device for, said mechanism.

19. In a riding-plow, the combination of a frame carryingwrhccls therefona plow,plowshifting mechanism comprising a link and a lever one of which is connected to the frame and the other of which is connected to the plow. a sliding-connection between the link and the lever whereby the power of the lever will he dill'crcnlially applied to shift the plow, and a lockingdcvice operated by saidover.

20. in a riding-plow. the combination of'- a frzunc. carrying-whet-ls therefor, a plow and mu'lltt'ilfillt for shifting tho plow co|nprising a link pivotally conncctcd to the;

link and said lc-v its positions.

v lockin frame, a lever pivotally connected to the plow, and a sliding connection between said 1' whereby the force of said levcr will he rl hcrentially applied.

91. In a ridir plow, the combination of a frame. carryi' -wheels therefor. a plow and mechanism 3 shifting the plow comprising a link pisotally connected to the. frame, a lever pivntally connected in the plow, a ltiling-con!it-rtion between the link and said lever whereby the forcc'of said lever will be differentially applied, and a li'ickinedevicc operat d by said lever.

' 2. In a ridingplow. the combination of a frame, carrying-wheels therefor, a plow and opcratirig-mechanism for shiftin the plow comprising a bail, a link, and a ever, one of which is pivoted to the frame and the other of which is pivotally and eccentrically connected to the bail, and a sliding the said connection which causes the force of lever to be differentially applied to crank or bail.

'23. In :Lriding-plow, the combination of a frame, carrying-wheels therefor, a plow and mechanism for shifting the plow comprising a bail connecting the plow and the frame, a link pivoted to the frame, and a lever pivutally connected to the bail and a. .lsliillng conneclion between said link and said over.

24. In a riding-plow, the combination of? a frame, carryiiig-wheels therefor, a plow, mechanism for shifting the plow comprising :1 bail between the frame and theplow, a. link, and a foot-lever, one of which is connected to the frame and the other of which is connected to the plow, a sliding-connection for causing the lever to be differentially applied and a lockin device for holding the lever and link in dead-center relation'to cause the same to lock the plow in one of 25. In a riding-plow, the combination of a frame, carrying-wheels therefor a plow and mechanism for shifting the p ow com prising a crank-connection between the frame and the plow, a link pivoted to the frame, a foot-lever iv'otallyconnected to said crank, and a sliding and ivotal connection between the lever and t e link.

26. In a riding-plow, the'combination of a frame, carrying-wheels therefor, a plow, mechanism for s ifting the plow com rising a crank between the frame and the p ow, a link pivoted to the frame, a footdever p1votally connected to said crank, a. sliding and pivotal connection between the lever and the link. and an automatically operating device for said connection.

27. n a riding-plow, the combination of carrying-wheels, a frame, a, plow, a foot- .upelable plow lowering mechanism, a footopcrable plow lifting-mechanism, a locking..

device for the lowermg mcchanism actuated 9 by the lifting-mechanism, and a locking-dovlce for the lifting-mechanism actuated by the lowering mechanism.

28. In a riding-plow, the combination of carrying-wheels, a frame, a plow, plow litting-meehanism, a foot-lever for the liftingmeehanism, a plow lmvering-meeliani m a foot-lever for the lowering-meehanism. a locking-device for the lowering-met-hanism releasable by the foot-lever of the lowering mechanism and actuated by the lifting-mechanism, and a locking-device releasable by the foot-lever of the liftinganeehanism and aetnated by the lowering mechanism.

29. In a riding-plow, the e mibination of carrying-wheels, a frame, a plow. plow shifting-ineehanism comprising a pivoted arm. a lever mounted to swin g eeeentrieall with respeet, to said arm, a sliding eonne: ion for varying the op rative length of one of said elements so that the tone of the lest-r will be dili'erentially applied to shift the plow and automatically operated hwking-dm ees for respectively holding the plow in raised and lowered position.

30. In a riding-plow. the eombination of carrying-wheels, a frame. a plow. plow shifting-meehanism eomprising a pivoted arm. a foot-lever mounted to swing et-t-t-ntrieally with resper-L to said arm, a sliding ('tlltl!t'4' tion l' or varying the operative length of one of said elements so that the fort-e of the lever will be diti'erentially applied to.shift. the plow, and automatically (iwl'hi. lot-king-cluviees for respectively holding the plow in raised and lowered positions.

31. In a riding plow, the combination of earrying-wheels, a frame, a plow. plow shifting-mechanism comprising an arm eonneeted to the plow, a lever for operating said arm, means for varying: the distant-t: between the point of applit-ation ol' the fort-e of the lever and the leYt'T'plVut to dill'erentiallyJapply the foree. of said lever to said arm and au'tomatieally operating ltxlilllg-(lOYlCPS for respeetively holding the plow in raised and lowered positions.

2'1". In a riding-plow, the eombination of earrying-wheels, a frame. a plow. plow liftingmm-hanism eompris ng an arm eonnerted to the plow, a foot-lever mounted to swing ereentrieally with respeel to said arm. a sliding eonneetion between the arm and the lever whereby the lever will be dillerentially applied to the arm. a plow lowering mechanism and anlomatieally operated looking-deviees respectively operated by said nuw-hanism for holding the plow in rai ed and lowered positions.

33. In a riding-plow, the eombination of a frame. earrying-wheels. a plow. plow shifting-ioeehanism eomprising a link and a foot-lover one of 'lllt'll is eonnerle l lo thet'rame and the other of whieb is (Ullllt'tled to the plow, a sliding-eonnvet ion between t l l parts \vhit'h eanses the foree of the lever to be ditl'erentially applied. a foot-operablo lifting-nn-ehanism and hn-king-deviees repet'tivel :n-lnated by said met-hanisms to hold th plow in raised and lowered posiions. I

"3 lit a riding-plow. the eomhination of one. earovingavheels. a plow, plow-lowering-meehanism eompri ing a t'tmt-lever. a link. and a sliding lllltt'llhll between the link and the l ver. and plow lifting-merhanism t-ompri ing a foot-lever. an arm and a slidin; nnwtion, and antomati -ally operated lm-king-deviees for said mechanisms.

.lti. ln-a !'itlli| pln\\'. the ('ombinalion of a frameeairvmg-wln-els. a plow. plow-lowerin niet-hanism t-oinprising a foot-lever, a link and a slidin g t'lllllltt'll ll between the, link and the lever. and plow-lil'ting-merlmni m t'Ulll|lll lll foot-lever. an arm and a slitling-t-onln-etion. and lot-lt'ingdevit-es respeetively operated by said mechanisms: and releasable by said fool-lever.

37. in a riding-plow. the eombination of a frame. earrying-wln-els, plow lilting-mechani m comprising a fmit-levenand a locking-derive for holding the lever in raised position. aid mei-hanism being, aetnatcd by said {with-var and means whereby said nn-t-hanism may be operated to hold the plow in ditl'erent raised positions.

t. lo a ridingplow. the eombinat ion of a frame, earrving-wln-els, plow liftitw-meehanism vomprising a foot-lever, a foi tt-lever for lowering the plow and a lot-king device aetnated by the foot-lever of the raising nn-ehanism and means for holding the plow in ditl't-rvnt raised positions and releasable by the foot-lever for lowering the plow.

139. In a riding-plow. the t'ulttllllttllltitt of a. frame, ea;'t' \'lng-\\'ln'tls, plow-lilting- :net-hanism eomprisin; a fwd-lever, a fo tlever for lowering the plo\\.'a loeking-deviee :n'tnatt-d by tho l'oot-h-u-r f the' liftingmeehanism and relea abl by the foot-lever for lowering the plow. a lm-ltiii; tlt-\'infor holding the plow in lowered position, and

mean for holdingthe plow in dill'erent, l'tlls'enl positions.

l in a ridingplow. tln' t'U'lI lllltlllUll of it l'ranie. lll'l' \'lllj f'lltt'lfi therefor. a plow, met'lialtl lll fut s'llll illlg the plow t'nlllpll 'lll t, a link pivoted to tlnl'rzune, and a erank, a h-verpivotally ronnevted to said erank, a.

Sliding and pivotal connection between the lever and the link. an antonmtieally operating loeking-device for mid connection, and a spring for holding the connection in one of its positions.

41. In a riding-plow, the combination of earning-wheels, n frame, a plow, a crankconnection between the frame and the plow, lowering-mechanism for the plow comprising a foot-lever and a link, one of which is pivoted to the frame and the other of which 15 ivotnlly conneetetl to the low, and 11 SH ingz-connertion whereby the ever will be mused to apply its force differentially to the plow, and means operated for lot-lung the conneetion in different positions.

452. In a ridingplow, the combination of carrying-wheels, a frame. a plow, a crankthe plow,

emnmrtzon hetween the frame itlltl lowering-marchunisin for the plow comprising a foot-lever and a link, one of which is pivoted to the frame and the other of which is pivotully conn cted to the plow, and a slidingwonneetion comprising an angular slot which causes ferei-tinlly in lowering the plow.

43. In a ritlingqilow, the combination of carrying-wheels, :1 frame, a plow, a crankconnection between the frame and the plow, loweririg-mechanism for the plow comprising a foot-lever and a link, one of which is pivoted to the frame and the other of which 15 pivotnlly connected to the plow. 2t slidingc'onneetion which c:iu-'(-s the force of the lever to he differentially applied, and a footoperulile lifting-nm'hzmisnr FRANK l". DAVIS.

\Yit nesses:

(l. \V. Dimnxsox, ll. J. .llinsnmnnn-zn.

the lever to be upplieri difl, 

